Abstract: An experiment was conducted to study the effects of different levels of raw and processed vetch (Vicia sativa) seeds on broiler performance. The experiment was carried out in a Completely Randomized Design. Four hundred and seventy six day-old broilers of male Hubbard strain were used. Seven treatments (dietary contain 0, 10, 20 and 30% levels raw or processed vetch seeds) were arranged by 4 replications and 17 broilers in each. The experiment period was 42 days and diets were isonitrogenous and isocaloric. Body weight gain was reduced significantly (p<0.05) by 20 and 30% raw and processed vetch seeds in comparison with control. No significantly difference was shown in body weight gain by 10% processed and 20% raw vetch seeds compared with control group. The similar reaction was found in feed conversion ratio between treatments with exception by 30% raw dietary vetch seed. The results of this study have shown that desirable performance was observed by 10% of common vetch seeds in broiler performance.